# Relationship history for MSHA mine 1519949

Current hierarchy: **Keith E  Thacker → TORCHLIGHT ENERGY INC → STONEY FORK #1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Keith E  Thacker → STONEY FORK #1; 2009-01-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** TORCHLIGHT ENERGY INC → STONEY FORK #1; 2023-09-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Keith E  Thacker → TORCHLIGHT ENERGY INC; 2023-09-14 to current/open; source msha-controller-operator-history